Die for molding clay pipes.



No. 660,286. Patented Oct. 23, I900.

M. .1. BANNON.

ms FOR momma CLAY mas.

(Application am; J in. 27, 1900.) I (No Model.) 2 Sheets-Sheet I.

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N0. 660,286. Patented Oct. 23, I900.

m. .1. BANNON.

DIE FOR MOLDING CLAY PIPES.

(Applicatinn filed Jan. 27, 1900.) (No Model.) 2 Shuts-Sheet ,2.

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PATENT om t.

MARTIN J. BANNON, OF LOUISVILLE, KENTUCKY.

DIE FOR MOLDING CLAY PIPES.

I SPECIFICATION forming part of Letters iatent No. dated October 1900- Application filed January 27, 1 900. Serialllo. 2,935. (No model) chinename ly, a Die .for Casting Improved Clay Pi pesfor the purposes hereinafter set forth, of which the tion.

My invention for which I seek the protec- I tion of a patent is of importance onlyby rea-i son of the improved clay pipe for envelop ing steam or water pipes laid underground, which improved clay pipe is alsoinvent'ed by} myself, but whichis probably. not patentable, I because the novelty is only that doing in clay pipes what has often beendone in iron pipes. Clay pipes have for some time been used to envelop steam or water-pipes laidi underground and are made in short sections,

following isa specifica pipe are inserted lengthwise. I propose to make the clay pipes in two semicircular seg-i ments, so that the lower segment having its proper rests can be laid downinto the ground, 3 the steam or water pipe put upon these rests, j and lastly the upper segment put on top, the two segments being fitted with lips on both sides, so as to make a water-tight connection.

The same thing is now done in the pillowblocks for the ordinary gearing of engines,

the pillow-block being in a sense a pipe within which a shaft turns, and it is made-of two half-pipes fitted together with lips, so that the lower half can'be laid down first. "Then the shaft can be put in position and the upper half or segment put on last. I propose to make enveloping clay pipes for steam or water pipes on the same principle, so that each section in length can be separately repaired or replaced; but the making of clay pipes requires very different machinery from that of iron pipesand of clay pipes with lips to both sides of the two segments different machinery from any known before, and this I will now describe.

Such machinery or die isillustrated in Figures 1 and 2 on the first sheet of drawings submitted herewith. The clay pipe to be made by this die is shown in Fig 3, 4, and 5 on the second sheet of drawings.

In the several figures the same parts as far as they reappear are denoted by the same letters.

To make the object of the machine clear, I

begin with the figures of the second sheet, all

of which give vertical sections of the claypipe, which is supposed to lie horizontally, as it does, in the ground. Fig.- 3 shows the pipe closed; Fig.2, its two halves separate from each other; Fig. 5, the two halves nearly fitting each other, with the inclosed steam or water pipe within.

On the firstsheet, Fig. 1 shows the die through which the clay is to be pressed and .which' is made up in 'the main of a vertical cylinder and cone in vertical cross-section that is, in the plane dividing such cylinder and cone througha diameter-while Fig. 2

.shows the die in circular section with a core .which corresponds to the hollowness of the clay pipe.

into which like sections of the steam or water Taking up the parts of the clay-pipe as shown in Figs.-3, 4, and'5 in detail, K in each of the end of each section of steam-pipe, with bolt-holes for attaching it to the next section, is seen to the outside, while the narrow ring between the dotted and the black circle stands for the body of the steam-pipe. The clay pipes will not be more than two or three feet in length, and as the inclosed steam or water pipes are much longer and need a rest only at greater intervals only one in four or five of the clay pipes needs the knobs P P. The

Q Q are the lips ex-- gas-pipe or rod (-markedO) is seen to rest on the knobs P P, while a steam-pipe L rests on this piece of gas-pipe or rod. The flange at others may be made without them, the lower half having the same smooth cavity as the upper.

vHaving thus shown the kind of product which I expect from my die, I proceed to set forth its construction as shown in Figs. 1 and 2. Dies for pressing clay pipes are well known in the art, and those shown in these figures differ from those in common'use only in details. The pressure is generally, though not always, applied vertically. In Fig. 1, A is a cylindrical cavity through which the clay comes down around a pillar B,which ends in the nut C, to a narrowing mold of which H H mark the outer walls and G G the inner walls. D D are the funnel-like cavity between the outer and lower walls of the mold. At the point where the cavity has narrowed to a mere ring of the thickness intended for the clay pipe to be produced the four screws E F F E are introduced, piercing the outer and inner walls of the mold, with the knives effe at their end, the blades whereof stand vertically and come pretty near to each other. In Fig. 2, A shows the widest part of the mold H, the outer wall where it becomes narrowest; D, the open ring or hollowness between the outer and inner wall at the narrowest level; G, the inner wall at the same level. L L are corners cut out in the inner wall, shaped so as to bring out the knobs P P in the clay pipe. E F F E are the screws, and effe the knives, as in Fig. 1, shown here in their true position in the horizontal plane. They lie obliquely to each other, and, strictly speaking, the outer ones should have been foreshortened in Fig. 1, so as to give the right perspective, which would have been needlessly difficult, and the two drawings together show the position of these screws and knives sufiiciently.

The letter B is not repeated in Fig. 2, as the pillar thus marked does not come down to the level in that figure; but there isadouble circle to identify its place.

' such mold will simply lack the indentations and bends (marked L L) and have the same outlines for the lower as for the upper segment of the pipe.

From an inspection of Fig. 2 it appears that the walls of the moldor die are of such an of clay connecting the two segments that by l a few slight taps with a hammer they can be separated without injury to either part. These taps will be applied after the pipe is baked. While being baked it must be kept in good cylindrical form by being in one piece.

Having declared already that molds for the pressing of clay pipes of the general character shown above are well known in the art, I confine my claims as an inventor to such a modification of the mold or die as will produce my improved clay pipe, and now say thatv What I claim as my invention, and desire to protect by Letters Patent, is-

l. A die for forming clay pipes, consisting of an inner and an outer ring spaced apart, recesses in the inside of the outer ring, knifeblades in the inner ring opposite to said recesses, and knife-blades in the outer ring located in said recesses and set obliquely to the inner knife-blades with a narrow space between the ends of the said inner and outer knife-blades.

2. A die for forming clay pipes consisting of an inner and outer ring spaced apart, having two square recesses in the outside of the inner ring, recesses in the inside of the outer ring, knife-blades in the inner ring opposite to said'last-mentioned recesses, and knife. 

